feat: 采购申请新增库管'完结'功能(仿出库审批)

- 后端:approve 接口支持 action=close(已通过→已完结 status 1→4),模型 status_text 支持已完结
- 前端:采购申请状态tab加'已完结',已通过单显示'完结'按钮(库管)

inventory-web/src/views/purchase/index.vue

@@ -10,6 +10,7 @@
         <el-radio-button :label="1">已通过</el-radio-button>
         <el-radio-button :label="2">已驳回</el-radio-button>
         <el-radio-button :label="3">已完成</el-radio-button>
+        <el-radio-button :label="4">已完结</el-radio-button>
       </el-radio-group>
       <el-button type="primary" :icon="Refresh" @click="fetchData">刷新</el-button>
       <el-button type="success" :icon="Plus" @click="openCreateDialog">
@@ -57,6 +58,10 @@
                     <el-button type="success" link size="small" @click="handleApprove(it)">通过</el-button>
                     <el-button type="danger" link size="small" @click="openRejectDialog(it)">驳回</el-button>
                   </template>
+                  <!-- ★ 已通过的采购申请：库管可手动完结 -->
+                  <template v-else-if="it.status === 1 && canClose">
+                    <el-button type="danger" plain link size="small" @click="handleCloseRequest(it)">完结</el-button>
+                  </template>
                 </template>
               </el-table-column>
             </el-table>
@@ -703,10 +708,16 @@ const canApprove = computed(() => {
     || userStore.hasPermission('inbound_purchase:operation')
 })
 
+// ★ 完结权限：超级管理员 / 库管（采购操作权限）
+const canClose = computed(() => {
+  return userStore.role === 'SUPER_ADMIN'
+    || userStore.hasPermission('inbound_purchase:operation')
+})
+
 // --- 工具函数 ---
 const statusTagType = (status: number) => {
   const map: Record<number, string> = {
-    0: 'warning', 1: 'success', 2: 'danger', 3: 'info'
+    0: 'warning', 1: 'success', 2: 'danger', 3: 'info', 4: 'info'
   }
   return map[status] ?? 'info'
 }
@@ -1170,6 +1181,26 @@ const handleApprove = async (row: any) => {
   }
 }
 
+// ★ 完结已通过的采购申请（库管）
+const handleCloseRequest = async (row: any) => {
+  try {
+    await ElMessageBox.confirm(
+      `确定强制完结采购申请【${row.request_no}】吗？\n\n` +
+      `此操作将使该单从「已通过」列表中移除，且不可恢复。`,
+      '⚠️ 强制完结确认',
+      { confirmButtonText: '确认完结', cancelButtonText: '取消', type: 'warning' }
+    )
+  } catch { return }
+
+  try {
+    await approvePurchase(row.id, { action: 'close' })
+    ElMessage.success(`采购申请 ${row.request_no} 已完结`)
+    await fetchData()
+  } catch (err: any) {
+    ElMessage.error(err?.msg || err?.message || '完结失败')
+  }
+}
+
 const openRejectDialog = (row: any) => {
   currentRejectRow.value = row
   rejectReason.value = ''